critical
9.1
CWE
20
Advisory Published
Updated

CVE-2021-46756: Input Validation

First published: Tue May 09 2023(Updated: )

Insufficient validation of inputs in SVC_MAP_USER_STACK in the ASP (AMD Secure Processor) bootloader may allow an attacker with a malicious Uapp or ABL to send malformed or invalid syscall to the bootloader resulting in a potential denial of service and loss of integrity.

Credit: psirt@amd.com

Affected SoftwareAffected VersionHow to fix
Amd Epyc 72f3 Firmware=milanpi_1.0.0.9
Amd Epyc 72f3
Amd Epyc 7313 Firmware=milanpi_1.0.0.9
Amd Epyc 7313
Amd Epyc 7313p Firmware=milanpi_1.0.0.9
Amd Epyc 7313p
Amd Epyc 7343 Firmware=milanpi_1.0.0.9
Amd Epyc 7343
Amd Epyc 7373x Firmware=milanpi_1.0.0.9
Amd Epyc 7373x
Amd Epyc 73f3 Firmware=milanpi_1.0.0.9
Amd Epyc 73f3
Amd Epyc 7413 Firmware=milanpi_1.0.0.9
Amd Epyc 7413
Amd Epyc 7443 Firmware=milanpi_1.0.0.9
Amd Epyc 7443
Amd Epyc 7443p Firmware=milanpi_1.0.0.9
Amd Epyc 7443p
Amd Epyc 7453 Firmware=milanpi_1.0.0.9
Amd Epyc 7453
Amd Epyc 7473x Firmware=milanpi_1.0.0.9
Amd Epyc 7473x
Amd Epyc 74f3 Firmware=milanpi_1.0.0.9
Amd Epyc 74f3
Amd Epyc 7513 Firmware=milanpi_1.0.0.9
Amd Epyc 7513
Amd Epyc 7543 Firmware=milanpi_1.0.0.9
Amd Epyc 7543
Amd Epyc 7543p Firmware=milanpi_1.0.0.9
Amd Epyc 7543p
Amd Epyc 7573x Firmware=milanpi_1.0.0.9
Amd Epyc 7573x
Amd Epyc 75f3 Firmware=milanpi_1.0.0.9
Amd Epyc 75f3
Amd Epyc 7643 Firmware=milanpi_1.0.0.9
Amd Epyc 7643
Amd Epyc 7663 Firmware=milanpi_1.0.0.9
Amd Epyc 7663
Amd Epyc 7713 Firmware=milanpi_1.0.0.9
Amd Epyc 7713
Amd Epyc 7713p Firmware=milanpi_1.0.0.9
Amd Epyc 7713p
Amd Epyc 7763 Firmware=milanpi_1.0.0.9
Amd Epyc 7763
Amd Epyc 7773x Firmware=milanpi_1.0.0.9
Amd Epyc 7773x
Amd Epyc 7232p Firmware=romepi_1.0.0.e
Amd Epyc 7232p
Amd Epyc 7252 Firmware=romepi_1.0.0.e
Amd Epyc 7252
Amd Epyc 7262 Firmware=romepi_1.0.0.e
Amd Epyc 7262
Amd Epyc 7272 Firmware=romepi_1.0.0.e
Amd Epyc 7272
Amd Epyc 7282 Firmware=romepi_1.0.0.e
Amd Epyc 7282
Amd Epyc 7302 Firmware=romepi_1.0.0.e
Amd Epyc 7302
Amd Epyc 7302p Firmware=romepi_1.0.0.e
Amd Epyc 7302p
Amd Epyc 7352 Firmware=romepi_1.0.0.e
Amd Epyc 7352
Amd Epyc 7402 Firmware=romepi_1.0.0.e
Amd Epyc 7402
Amd Epyc 7402p Firmware=romepi_1.0.0.e
Amd Epyc 7402p
Amd Epyc 7452 Firmware=romepi_1.0.0.e
Amd Epyc 7452
Amd Epyc 7502 Firmware=romepi_1.0.0.e
Amd Epyc 7502
Amd Epyc 7502p Firmware=romepi_1.0.0.e
Amd Epyc 7502p
Amd Epyc 7532 Firmware=romepi_1.0.0.e
Amd Epyc 7532
Amd Epyc 7542 Firmware=romepi_1.0.0.e
Amd Epyc 7542
Amd Epyc 7552 Firmware=romepi_1.0.0.e
Amd Epyc 7552
Amd Epyc 7642 Firmware=romepi_1.0.0.e
Amd Epyc 7642
Amd Epyc 7662 Firmware=romepi_1.0.0.e
Amd Epyc 7662
Amd Epyc 7702 Firmware=romepi_1.0.0.e
Amd Epyc 7702
Amd Epyc 7702p Firmware=romepi_1.0.0.e
Amd Epyc 7702p
Amd Epyc 7742 Firmware=romepi_1.0.0.e
Amd Epyc 7742
Amd Epyc 7f32 Firmware=romepi_1.0.0.e
Amd Epyc 7f32
Amd Epyc 7f52 Firmware=romepi_1.0.0.e
Amd Epyc 7f52
Amd Epyc 7f72 Firmware=romepi_1.0.0.e
Amd Epyc 7f72
Amd Epyc 7h12 Firmware=romepi_1.0.0.e
Amd Epyc 7h12
Amd Epyc 7251 Firmware=naplespi_1.0.0.j
Amd Epyc 7251
Amd Epyc 7261 Firmware=naplespi_1.0.0.j
Amd Epyc 7261
Amd Epyc 7281 Firmware=naplespi_1.0.0.j
Amd Epyc 7281
Amd Epyc 7301 Firmware=naplespi_1.0.0.j
Amd Epyc 7301
Amd Epyc 7351 Firmware=naplespi_1.0.0.j
Amd Epyc 7351
Amd Epyc 7351p Firmware=naplespi_1.0.0.j
Amd Epyc 7351p
Amd Epyc 7371 Firmware=naplespi_1.0.0.j
Amd Epyc 7371
Amd Epyc 7401 Firmware=naplespi_1.0.0.j
Amd Epyc 7401
Amd Epyc 7401p Firmware=naplespi_1.0.0.j
Amd Epyc 7401p
Amd Epyc 7451 Firmware=naplespi_1.0.0.j
Amd Epyc 7451
Amd Epyc 7501 Firmware=naplespi_1.0.0.j
Amd Epyc 7501
Amd Epyc 7551 Firmware=naplespi_1.0.0.j
Amd Epyc 7551
Amd Epyc 7551p Firmware=naplespi_1.0.0.j
Amd Epyc 7551p
Amd Epyc 7571 Firmware=naplespi_1.0.0.j
Amd Epyc 7571
Amd Epyc 7601 Firmware=naplespi_1.0.0.j
Amd Epyc 7601

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Reference Links

Frequently Asked Questions

  • What is CVE-2021-46756?

    CVE-2021-46756 is a vulnerability in the SVC_MAP_USER_STACK in the ASP bootloader of AMD Secure Processor that may allow an attacker to send malformed syscalls, leading to a denial of service and loss of integrity.

  • What is the severity of CVE-2021-46756?

    CVE-2021-46756 has a severity rating of 9.1, classified as critical.

  • How can I mitigate CVE-2021-46756?

    To mitigate CVE-2021-46756, it is recommended to apply the patches provided by AMD and follow the security guidelines outlined in the provided references.

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